onlyfence

OnlyFence

Safe, full-featured DeFi toolkit for AI agents.
_{Guardrails first. Swap, lend, borrow, and manage positions — without risking your wallet.}

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What is OnlyFence?

OnlyFence is a free, open-source DeFi toolkit that gives your AI agent full onchain capabilities — with safety guardrails built in from day one.

Your agent can swap tokens, lend, borrow, open and close positions, and run complex strategies. OnlyFence makes sure it can never go beyond the limits you set.

Think of it like giving your AI agent a company credit card with spending limits instead of handing over your bank account.

The Problem

AI agents need wallet access to trade, lend, borrow, and manage positions. But raw wallet access means:

• The agent can trade tokens you didn't approve
• There's no limit on how much it can spend
• A single bug or prompt injection can drain everything in seconds
• You have zero visibility into what it's actually doing

You wouldn't give an employee unlimited access to the company funds. So why give your AI agent unlimited access to your wallet?

The Solution

OnlyFence gives your agent everything it needs to execute DeFi strategies — while keeping you in control.

Your AI Agent → OnlyFence → Blockchain
                   │
      ┌────────────┴────────────┐
      │  ✅ Token approved?      │
      │  ✅ Under trade limit?   │
      │  ✅ Under daily limit?   │
      │  ✅ Strategy allowed?    │
      └─────────────────────────┘

  All checks pass → action executes
  Any check fails → action blocked, you stay safe

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What Can Your Agent Do With OnlyFence?

Action	Status	Description
Swap	Live	Trade tokens with best-price routing — 7K on Sui, Jupiter on Solana, Paraswap on Ethereum
Check balance	Live	Query wallet balances and token prices across every configured chain
Lend	Live	Supply assets to earn yield — AlphaLend (Sui), Jupiter Lend (Solana), Aave V3 (Ethereum)
Borrow	Live	Borrow against collateral for leveraged strategies
Open / close position	Live	Enter and exit leveraged long/short perps — Bluefin Pro (Sui), Jupiter Perps (Solana), Hyperliquid (Ethereum)
LP (Liquidity)	Coming soon	Deposit, withdraw, compound, and rebalance LP positions
Stake	Coming soon	Stake tokens for protocol rewards

Every action goes through your safety rules first. Your agent gets rich DeFi capabilities — you keep full control.

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Why OnlyFence?

	Without OnlyFence	With OnlyFence
DeFi capabilities	Build everything yourself	Swap, lend, borrow, LP — out of the box
Spending control	Unlimited — agent can spend everything	You set per-trade and daily limits
Token control	Agent can trade anything	Only tokens you approve
Visibility	No idea what the agent is doing	Full history with audit log
Your keys	Often sent to a server	Stay on your computer, encrypted
Infrastructure	Usually needs a server or account	Nothing — runs 100% on your machine
Cost	Often paid service	Free and open source

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Install

One command. Takes about 30 seconds.

curl -fsSL https://raw.githubusercontent.com/seallabs/onlyfence/main/install.sh | sh

That's it. No account needed. No sign-up. No credit card.